Object name: VDB136
Designation(s): VDB136, GN20.36.5,
HD 196819 is a magnitude 7.5 K3III (orange giant) star in Cygnus SSW of Deneb located about 2500 light-years away according to Hipparcos data. It is rather rare for such a star to illuminate a reflection nebula. In this case, it creates a rather yellow orange nebula rather than the blue color usually associated with reflection nebula. The Nebula is known as vdB 136 as well as GN 20.36.5. The field has lots of H alpha emission of warm ionized hydrogen gas. That has to be illuminated by a super hot blue star in the area though. The bluest star above BD+41 3833 is a B8 star at a bit less than 2600 light-years by Hipparcos. It may be providing the needed UV radiation. Only a guess as I couldn't find anything definitive.